For me, it would be quite a few things, some simple and some not:
A portal, as said, and a shoutbox as said, but optional, as in you can select an option to disable and enable each one of them individually.
Better profiles, let users have more options and admins choose between different profile layouts such as putting pieces of data in different places on screen.
Easier image changing, like what Invisionfree did here:
http://www.photosled.com/data/500/me...gechanging.PNG
Where you choose an address or text replacement for the image, and it automatically changes all templates rather than having to make the replacement images the same file names as the original ones or changing templates. Like what you can do with the logo already.
Finally, an inbuilt points and shops system would be good, but as an option rather than compulsory default, maybe even as an official product.